Multipath configuration
Red Hat Enterprise Linux 4 Update 4 does not include a default multipath configuration for the Storwize® V3500 system.
You must update the device part of your multipath.conf
as follows:
device {
vendor "IBM "
product "2145"
path_grouping_policy group_by_prio
prio_callout "/sbin/mpath_prio_alua /dev/%n"
features "1 queue_if_no_path"
path_checker tur
}